Manipulating Charge Transfer and Transport via Intermediary Electron Acceptor Channels Enables 19.3% Efficiency Organic Photovoltaics

Advanced Energy Materials, Год журнала: 2022, Номер 12(39)

Опубликована: Авг. 21, 2022

Abstract Balancing and improving the open‐circuit voltage ( V oc ) short‐circuit current density J sc synergistically has always been critical point for organic photovoltaics (OPVs) to achieve high efficiencies. Here, this work adopts a ternary strategy regulate trade‐off between by combining symmetric‐asymmetric non‐fullerene acceptors that differ at terminals alkyl side chains build OPV (TOPV). It is noticed reduced energy disorder enhanced luminescence efficiency of TOPV enable mitigated loss higher . Meanwhile, third component, which distributed host donor–acceptor interface, acts as charge transport channel. The prolonged exciton lifetime, boosted mobility, depressed recombination promote obtain an improved Finally, with , delivers optimal 19.26% (certified 19.12%), representing one highest values reported so far.

Язык: Английский

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Advances in organic photovoltaic cells: a comprehensive review of materials, technologies, and performance

RSC Advances, Год журнала: 2023, Номер 13(18), С. 12244 - 12269

Опубликована: Янв. 1, 2023

The paper analyzes the key features, performance, efficiency, and electrical characteristics of organic PV cells to highlight latest trends advancements by using comparative tables a comprehensive SWOT analysis.

Язык: Английский

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Enhancing Photon Utilization Efficiency for High‐Performance Organic Photovoltaic Cells via Regulating Phase‐Transition Kinetics

Advanced Materials, Год журнала: 2023, Номер 35(16)

Опубликована: Янв. 30, 2023

Efficient photon utilization is key to achieving high-performance organic photovoltaic (OPV) cells. In this study, a multiscale fibril network morphology in PBQx-TCl:PBDB-TF:eC9-2Cl-based system constructed by regulating donor and acceptor phase-transition kinetics. The distinctive process crystal size are systematically investigated. PBQx-TCl eC9-2Cl form structures with diameters of ≈25 nm ternary films. Additionally, fine fibrils assembled PBDB-TF uniformly distributed over the networks eC9-2Cl. ideal enables achieve superior charge transfer transport processes compared binary systems; these improvements promote enhanced efficiency. Finally, high power conversion efficiency 19.51% single-junction OPV cell achieved. external quantum optimized exceeds 85% wide range 500-800 nm. A tandem also fabricated increase solar absorption. has an excellent PCE more than 20%. This study provides guidance for constructing improving

Язык: Английский

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Multiphase Morphology with Enhanced Carrier Lifetime via Quaternary Strategy Enables High‐Efficiency, Thick‐Film, and Large‐Area Organic Photovoltaics

Advanced Materials, Год журнала: 2022, Номер 34(45)

Опубликована: Сен. 15, 2022

With the continuous breakthrough of efficiency organic photovoltaics (OPVs), their practical applications are on agenda. However, thickness tolerance and upscaling in recently reported high-efficiency devices remains challenging. In this work, multiphase morphology desired carrier behaviors realized by utilizing a quaternary strategy. Notably, exciton separation, mobility, lifetime enhanced significantly, recombination energy loss (Eloss ) reduced, thus beneficial for higher short-circuit density (JSC ), fill factor (FF), open-circuit voltage (VOC system. Moreover, intermixing-phase size is optimized, which favorable constructing thick-film large-area devices. Finally, device with 110 nm-thick active layer shows an outstanding power conversion (PCE) 19.32% (certified 19.35%). Furthermore, (1.05 72.25 cm2 nm present PCEs 18.25% 12.20%, 305 film (0.0473 delivers PCE 17.55%, among highest values reported. The work demonstrates potential strategy OPVs promotes application future.

Язык: Английский

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In situandex situinvestigations on ternary strategy and co-solvent effects towards high-efficiency organic solar cells

Energy & Environmental Science, Год журнала: 2022, Номер 15(6), С. 2479 - 2488

Опубликована: Янв. 1, 2022

High efficiencies for organic solar cells are achieved. Two different morphology change paths revealed with both in situ and ex measurements.

Язык: Английский

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Stability of organic solar cells: toward commercial applications

Chemical Society Reviews, Год журнала: 2024, Номер 53(5), С. 2350 - 2387

Опубликована: Янв. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Язык: Английский

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A 19% efficient and stable organic photovoltaic device enabled by a guest nonfullerene acceptor with fibril-like morphology

Energy & Environmental Science, Год журнала: 2023, Номер 16(3), С. 1062 - 1070

Опубликована: Янв. 1, 2023

A nonfullerene acceptor, isoIDITC, capable of exhibiting fibril-like morphology, is utilized as a third component in organic photovoltaic devices. power conversion efficiency 19% achieved ternary PM6:BTP-eC9:isoIDITC bulk-heterojunction

Язык: Английский

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Controlling Morphology and Voltage Loss with Ternary Strategy Triggers Efficient All-Small-Molecule Organic Solar Cells

ACS Energy Letters, Год журнала: 2023, Номер 8(2), С. 1058 - 1067

Опубликована: Янв. 23, 2023

Herein, an emerging acceptor L8-BO as the third component was combined with B1:BO-4Cl system for constructing efficient ternary all-small-molecule organic solar cells (ASM-OSCs). Theoretical, morphological, and crystallographic studies reveal that BO-4Cl possess good compatibility, resulting in alloy-like state formation of two acceptors blends. The synergistic effect is conducive to forming favorable phase separation molecular stacking promoting charge splitting extraction, which contributes simultaneously boosting short-circuit current density fill factor. Furthermore, higher lowest unoccupied orbital energy level assist ASM-OSCs achieving lower voltage loss respect binary devices. optimal 20 wt % deliver a top-level efficiency 17.10%. This work demonstrates not only morphology but also small matrix can be well-manipulated by employing strategy.

Язык: Английский

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Harnessing the Structure‐Performance Relationships in Designing Non‐Fused Ring Acceptors for Organic Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(21)

Опубликована: Фев. 17, 2023

Abstract The prerequisite for commercially viable organic solar cells (OSC) is to reduce the efficiency‐stability‐cost gap. Therefore, cost of materials should be reduced by minimizing synthetic steps, yet maintaining molecular planarity and efficiencies achieved fused ring acceptors (FRA). In this respect, developing non‐fused (NFRA) with suitable functionalization favor conformational effective packing beneficial cost‐effective. Presently, power conversion efficiency (PCE) NFRAs around 16 %, lower than 19 % FRAs. Despite their potential, a thorough understanding structural design necessary efficient OSCs. This article pays special attention concept developed in last years analyzed approach toward improvement, an important step technological application.

Язык: Английский

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Structurally Complementary Star‐Shaped Unfused Ring Electron Acceptors with Simultaneously Enhanced Device Parameters for Ternary Organic Solar Cells

Solar RRL, Год журнала: 2023, Номер 7(11)

Опубликована: Апрель 8, 2023

Ternary strategy has attracted extensive attention for bulk heterojunction organic solar cells (BHJ OSCs) owing to their potentially improved light harvesting, cascaded energy levels, and optimized film morphology of binary BHJs. Herein, three novel star‐shaped unfused ring electron acceptors (SSUFREAs), i.e., H 1–3, with without fluorine‐substituent in phenyl core or peripheral group are designed synthesized as third components via direct C–H arylation incorporate into PM6:Y6 BHJ films. The structure–property–performance dependence study reveals that the isotropic charge transfer, complementary star‐shape structure absorption, energy‐level cascades 1–3 PM6 Y6 allow ternary BHJs have higher power conversion efficiency (PCE) compared BHJ. Among them, involving fluorine‐free 1, 1:PM6:Y6, possesses highest PCE (16.57%) high‐lying frontier molecular orbital enlarged torsion angle, which enhances open‐circuit voltage, inhibits excessive crystallization Y6, facilitates exciton dissociation well collection. findings indicate SSUFREAs great potential serve optimize improve voltage OSCs.

Язык: Английский

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